The presentation is ready, but the projector shows only its startup screen. Just before the event, it becomes unclear whether the cable, selected input, or display setting is responsible. A short connection plan removes much of that uncertainty. Ask which input is actually available at the venue rather than merely confirming that a projector exists.
Establish the video path
Record the laptop output and projector input. If an adapter is necessary, check its direction and the computer's supported video output. A USB-C socket that physically fits does not establish that capability. Bring a combination you have already tried where possible, and avoid unnecessary intermediate adapters.
Consider cable length in the room arrangement. The laptop should remain accessible without a cable stretched across a walkway. When the venue provides equipment, establish who will connect and operate it. A brief test appointment is more useful than a general assurance of compatibility.
Select the input and display mode
Set the projector to the input being used and connect the laptop. Then deliberately choose between mirroring and extending. Mirroring shows the same picture on both displays. Extending creates another workspace and can support presenter view, but requires checking which view the audience receives.
Open the presentation and inspect it from an audience position. Confirm that speaker notes and private windows are absent. Check resolution and aspect ratio. Stretching or clipped edges should be corrected before the talk. Small labels may require a simpler slide rather than merely another technical setting.
Include sound and a fallback
If the presentation includes video or audio, test sound output separately. A working picture does not establish that sound comes from the intended speakers. Use a short, harmless sample at a suitable volume. Prevent notifications from interrupting the session.
Keep an appropriate static alternative available when animation is not essential. Save required files locally where permitted and test them without a network connection beforehand. After the event, end the presentation and disconnect the projector before bringing private applications back onto the screen. That final step matters as much as establishing the connection at the beginning.